Knife sharpener



Diem i8 1923.

Filed Aug. 13. 1921 Patented Dec. 18, 1923.

A innate THOMAS T. GRASER, OF SYRACUSE, NEW YORK, ASSIGNOR TO SURE-CUTSHARPENER CO., INC., OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

KNIFE SHARPE NER.

Application filed August 13, 1921. Serial No. 491,982.

To all whom it may concern:

Be it known that I, THOMAS T. Gnnsnn, a citizen of the United States,residing at Syracuse, in the county of Onondaga and State of New York,have invented certain new and useful Improvements in Knife Sharpeners,of which the following is a specification.

This invention relates to improvements in knife sharpening devices, andhas for its object to provide a novel, simple and handy device of theclass, which may be mounted in stationary manner in any convenientplace. A further object is to provide an abrading member which ismounted in a novel and simple holder, the said holder cooperating withthe abrading member for holding knives, scissors, and the like, in theproper positions during the sharpening operations. And a further objectis to provide simple means for adjusting the abrading member forshifting unworn surfaces to the sharpening position.

I attain these objects by the means set forth in the detaileddescription which fol lows, and as illustrated by the accompany indrawing, in which Figure 1 is a side elevation of the com plete devicemounted ready for use. Fig. 2 is a central vertical section, taken online 2-2 of Fig. 3. Fig. 3 is a top-plan view of the sharpener. Fig. 4is an end elevation of the same. And Fig. 5 is a side view of theabrading member.

In the drawing, 2 represents the abrading member, which is preferablycircular, and having parallel sides 2', and flat peripheral face 2 a.miniature of the well-known grind-stones. The member 2 is provided witha central bore or opening 2. 3 represents the bracket or holder for themember 2, which is preferably made of sheet metal, and is folded uponitself for providing similar tapering parallel arms 3; the arms beingsupported by an integral back 3, which is perforated near its oppositeends to re ceive screws 4, by means of which the device may be rigidlysecured to any suitable support, as 5. The space between the arms 3 ispreferably substantially the same as the thickness of the abradingmember 2. and the said arms are provided with medial perforations 3*.The abrading member 2 is supported and adjustably held in place by abolt 8, which passes through the perforations 3 and the opening 2", andby a nut S'which engages the threaded end of the bolt. In practice, thenut 8 is preferably screwed up until the medial portions of the arms 3are drawn tightly against the opposite sides of the abrading member, forpreventing the said member from rotating accidentally during thesharpening operations. By this construction, and arrange ment, themember 2 may be readily and quickly loosened and rotated in eitherdirection by the operator, for bringing fresh and unworn abradingsurfaces to the sharpening positions directly opposite and in registrywith the free ends of the arms 3. The arms 3 are preferably bentoutwardly at an angle not to exceed as best seen in Figs. 3 and 4, forproviding similar V- shaped crevices or grooves 6 at the opposite sidesof the member 2, into which the cutting edges of knives, or the bladesof shears, and the like, may be inserted and held while the operatormoves the said tools back or forth during the sharpening operations. Atthe bottoms of the crevices 6, the arms 3' are preferably slightlycurved, as shown in Fig. 4, for facilitating the entrance and guiding ofthe relatively thin cutting-edges of carving and other knives. By thusincreasing the acuteness of the bottoms of the crevices 6, the edges ofknife-blades may be forced and held more tightly against the abradingwheel 2, for effecting a more rapid and even sharpening of the tools.During the sharpening operations, the operator should exert a slightinward or downward pressure on the blades, and in order to properlysharpen knives, the blades should be regularly shifted from one crevice6 to the other at the start of the alternate strokes. The free ends ofthe arms 3 being relatively narrow, and the metal preferably beingslightly flexible, tends to hold the cuttingedges of the knives againstthe member 2 with sufiicient tension to effect the even abrading of themetal of the tools. My devi e is also intended to be utilized forsharpening scissors and similar tools, whose cutting edges are usuallybeveled. For this purpose the free ends of the arms 3' are dis posed atan angle of substantially 45, as

shown. To sharpen scissors, the operator places the plain flat sides ofthe blades fairly against the incline surface of the arm 3, whichpositions the usual bevel (not shown) parallel to the corresponding faceof the abrading wheel 2. The blades should be then firmly held in thelast described position, While being drawn through the crevices 6; Thesharpening device being rigidly mounted on a suitable support, does notrequire to be handled, eXcept for adjusting the abrading member, and theprovision of the flaring arms 3 at the opposite sides of the member 2,not onlyv facilitates the ready and efi'ectual sharpening 0]": thedifferent tools, but also serves to safeguard the op erator, as Well asto prevent .injury to the tools. I 7 t Having thus described myinvention, what I claim, is-

1. A knife sharpener comprising an abrading disk, a bracket bent up fromsheet metal into substantially U-form the sides of the bracket being oftriangular shape having broad'lower edges joining a flat elongated base,said. sides contacting the opposite. sides oi the disk, and meanspassing tions of the base, and

2. In a knife sharpener, a bracket hav and substantially ing a longnarrow base triangularly'shaped sides, a circular abrading member heldbetween the sides in flat cont-acting rotation therewith, the baseunderlying and extending at its opposite ends beyond the periphery ofsaid abrading member to admit of easy access to the end porsecuringmeans passing through the end portions of the base at points beyond theperiphery of the abrading member, the free ends of said triangularbraoketsides diverging outwardly from the opposite sides of the abradingmembers and being resilient.

In testimony whereof I atfix my signature.

THOMAS T. GBASER.

